ZyXEL Communications NBG6716, Руководство пользователя

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NBG6716 User’s Guide
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Content Filtering
18.1 Overview
This chapter provides a brief overview of content filtering using the embedded web GUI.
Internet content filtering allows you to create and enforce Internet access policies tailored to your
needs. Content filtering is the ability to block certain web features or specific URL keywords.
18.1.1 What You Need To Know
The following terms and concepts may help as you read through this chapter.
Content Filtering Profiles
Content filtering allows you to block certain web features, such as cookies, and/or block access to
specific web sites. For example, you can configure one policy that blocks John Doe’s access to arts
and entertainment web pages.
A content filtering profile conveniently stores your custom settings for the following features.
Keyword Blocking URL Checking
The NBG6716 checks the URL’s domain name (or IP address) and file path separately when
performing keyword blocking.
The URL’s domain name or IP address is the characters that come before the first slash in the URL.
For example, with the URL
www.zyxel.com.tw/news/pressroom.php , the domain name is
www.zyxel.com.tw .
The file path is the characters that come after the first slash in the URL. For example, with the URL
www.zyxel.com.tw/news/pressroom.php , the file path is news/pressroom.php .
Since the NBG6716 checks the URL’s domain name (or IP address) and file path separately, it will
not find items that go across the two. For example, with the URL
www.zyxel.com.tw/news/
pressroom.php , the NBG6716 would find “tw” in the domain name ( www.zyxel.com.tw) . It would
also find “news” in the file path ( news/pressroom.php ) but it would not find “tw/news”.
18.2 Content Filter
Use this screen to restrict web features, add keywords for blocking and designate a trusted
computer. Click
Security > Content Filter to open the Content Filter screen.